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    • 3. 发明申请
    • PULSED X-RAY FOR CONTINUOUS DETECTOR CORRECTION
    • 用于连续检测器校正的脉冲X射线
    • WO2006064403A2
    • 2006-06-22
    • PCT/IB2005/054069
    • 2005-12-05
    • KONINKLIJKE PHILIPS ELECTRONICS, N.V.LUHTA, Randall, P.CHAPPO, Marc, A.HARWOOD, Brian, E.MATTSON, Rodney, A.VRETTOS, Chris, J.
    • LUHTA, Randall, P.CHAPPO, Marc, A.HARWOOD, Brian, E.MATTSON, Rodney, A.VRETTOS, Chris, J.
    • A61B6/032A61B6/585G01T1/24
    • A radiographic imaging apparatus (10) comprises a primary radiation source (14) which projects a beam of radiation into an examination region (16). A detector (18) converts detected radiation passing through the examination region (16) into electrical detector signals representative of the detected radiation. The detector (18) has at least one temporally changing characteristic such as an offset B(t) or gain A(t). A grid pulse means (64) turns the primary radiation source (14) ON and OFF at a rate between 1000 and 5000 pulses per second, such that at least the offset B(t) is re-measured between 1000 and 5000 times per second and corrected a plurality of times during generation of the detector signals. The gain A(t) is measured by pulsing a second pulsed source (86, 100, 138) of a constant intensity (XRef) with a second pulse means (88). The gain A(t) is re-measured and corrected a plurality of times per second during generation of the detector signals.
    • 射线成像设备(10)包括将辐射束投射到检查区域(16)中的主要辐射源(14)。 检测器(18)将通过检查区域(16)的检测到的辐射转换成代表检测到的辐射的电检测器信号。 检测器(18)具有至少一个时变特性,如偏移量B(t)或增益A(t)。 电网脉冲装置(64)以每秒1000至5000个脉冲之间的速率使主辐射源(14)接通和断开,使得至少偏移B(t)在每秒1000至5000次之间重新测量 并且在检测器信号的产生期间多次校正。 通过用第二脉冲装置(88)脉冲具有恒定强度(XRef)的第二脉冲源(86,100,138)来测量增益A(t)。 在检测器信号的产生期间,增益A(t)被重新测量和校正多次。
    • 4. 发明申请
    • RADIATION DETECTOR WITH SHIELDED ELECTRONICS FOR COMPUTED TOMOGRAPHY
    • 具有用于计算机图像的屏蔽电子的辐射检测器
    • WO2004061478A1
    • 2004-07-22
    • PCT/IB2003/006268
    • 2003-12-17
    • KONINKLIJKE PHILIPS ELECTRONICS N.V.MATTSON, Rodney, A.LUHTA, Randall, P.CHAPPO, Marc, A.
    • MATTSON, Rodney, A.LUHTA, Randall, P.CHAPPO, Marc, A.
    • G01T1/20
    • G01N23/046G01N2223/419G01T1/2018G01T1/2985
    • A radiation detector module includes a scintillator (62, 62', 162, 262) arranged to receive penetrating radiation of a computed tomography apparatus (10). The scintillator produces optical radiation responsive to the penetrating radiation. A detector array (66, 66', 166, 266) is arranged to convert the optical radiation into electric signals. Electronics (72, 72', 172, 272) are arranged on a side of the detector array opposite from the scintillator in a path of the penetrating radiation. A radiation shield (86, 86', 100, 100', 100'', 186, 210, 210', 286, 286') is disposed between the detector array and the electronics to absorb the penetrating radiation that passes through the scintillator. The radiation shield includes openings (90, 90') that communicate between the detector array and the electronics. Electrical feedthroughs (88, 88', 102, 102', 102'', 188, 212, 212', 288, 288') pass through the radiation shield openings and electrically connect the detector array and the electronics.
    • 放射线检测器模块包括布置成接收计算机断层摄影装置(10)的穿透辐射的闪烁体(62,62',162,262)。 闪烁体产生响应穿透辐射的光辐射。 检测器阵列(66,66',166,266)被布置成将光辐射转换成电信号。 在穿透辐射的路径中,电子器件(72,72',172,272)被布置在与闪烁体相反的检测器阵列的一侧。 辐射屏蔽(86,86',100,100',100“,186,210,210',286,286')设置在检测器阵列和电子器件之间以吸收穿过闪烁体的穿透辐射。 辐射屏蔽包括在检测器阵列和电子装置之间通信的开口(90,90')。 电馈通(88,88',102,102',102“,188,212,212',288,288')穿过辐射屏蔽开口并电连接检测器阵列和电子装置。